Taste is subjective only to a very small degree. Most people would dislike the taste of rotten meat or spoiled milk. If taste would be fully subjective it could serve no purpose and there would be no reason for its existence.
I know you cannot be serious. If taste was not subjective there would hardly be the variety in meals we see all over the world.
And yes, if you go to extremes like rotten meat, there is of course little dispute. However, many cultures have developed certain dishes that they consider delicacies while outsiders would find them revolting.
But even from everyday experience, I'm sure even you will reassess your position if you think about it a bit more. Have you never had the experience that some food that you absolutely love and need others to try gets you little more than a shoulder shrug from someone else?
Taste even changes over time which is another intuitive reason why your claim makes little sense. Do you remember the first time you've tried coffee or beer (if you drink those)? Most people are not too fond of these flavors at first, yet they drinks are among the most consumed beverages, at least in Western societies.
The kind of taste changes we're talking about here are not subjective though. E.g. they're not about "I like it more or less" but e.g. about the taste changing from sweeter to less sweet.
For example tomatoes (it's covered in a few books on the subject) have lost a large part of their sugar content after the 80s due to mass market techniques and genes that yield more and less quickly riping ones, but of lower taste.
